Our fourth report – Global Warming’s Six Americas in May 2011 – shows that the proportion of the population in each of the Six Americas has remained relatively stable over the past year. Nearly 40 percent of American adults are in the two groups most concerned about climate change – the Alarmed and the Concerned – while 25 percent of Americans are in the two groups least concerned about the issue – the Dismissive and Doubtful.

In September we released a special report from this survey. Politics & Global Warming: Democrats, Republicans, Independents, and the Tea Party reports how the members of each political party respond to the issue of global warming. The Tea Party has become an important new player in American politics, so this report for the first time separates their views on global warming from the traditional political categories of Democrats, Republicans, and Independents.

For an outline of the basic purpose and content of the Six Americas studies, please read this summary.